Not sure exactly what you did, but with de-smogs, it's best to go 100% all the way or not do it at all. Your symptoms sound like a vacuum leak.
Maybe it's as easy as a dislodged vacuum line so look very carefully in the area you were working.
Also with a full desmog, there is some carb work to do and optimally get your distributor advance recurved.
1997 FZJ80 Desert traveller
1989 FJ62-OME, 33s, OME suspension, H55f
1984 FJ60-SOA, H41, toybox, locked, 37s, Rubicon edition
1971 FJ40-SOA, FJ60 axles, 85 2F, it abides